Colt M4 Commando "CAL 5.56MM" Lower Receiver Assembly
Colt factory-marked AR-15/M4 pattern lower receiver with Colt prancing pony rollmark and "M4 COMMANDO" model marking. The receiver is marked "CAL 5.56MM" and features "SAFE" / "FIRE" selector markings.
This lower is configured as an assembled unit with receiver extension (buffer tube) installed, along with end plate/castle nut and an A1-style (smooth-front) pistol grip.



